백준 C# 10952

using System;
using System.Text;
namespace baek2
{
    class Program
    {
        static void Main(string[] args)
        {
            while(true)
            {
                string n_input = Console.ReadLine();
                string[] input = n_input.Split();
                int A = int.Parse(input[0]);
                int B = int.Parse(input[1]);

                if ((A == 0) && (B == 0)) return;

                Console.WriteLine(A+B);

                
            }
        }
    }
}